Subtraction From 20

Grade Levels
1st, Homeschool
Formats Included
  • Zip
160 pages
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  1. Comprehensive 1st Grade Math Practice and Assessments resource. Includes 9 zip files: Count to 120, Add to 20, Subtract from 20, Place Value, Shapes, Fractions, Graphing, Telling Time, and Measurement. Over 800 pages of worksheets, and assessments. All Common Core aligned, with answer keys.You can s
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Subtracting from 20 is an important 1st Grade math standard that includes learning subtraction strategies, finding differences with missing numbers in all positions, and relating addition to subtraction to name a few.

This resource was created to provide year-round practice for subtraction from 20, subtraction strategies, and word problem solving skills.

It consists of several types of worksheets and assessments that start at the end of Kindergarten level, and progressively go towards mastery of the 1st Grade Common Core Standards for subtraction from 20.

This resource will take you from day one to day 180! You’ll find plenty of practice for teaching and re-teaching, pre and post-assessments, all with answer-keys! Ideal for differentiating instruction.

This resource is organized in 3 files. The first one has sheets for subtraction practice. The second one has sheets for word problem solving practice, and the third one has assessments for each of the skills.

✔ Get it in a BUNDLE right here.


File #1 – Subtract from 20 (34 pages + answer keys)

• Understand Subtraction

• Subtract Objects

• Subtract Within 10

• Count Back on Number Lines Within 10

• Count Back on Number Lines Within 20

• Subtract From 10 – Change Unknown

• Use Subtraction Strategies

• Fact Families

• Equations with Symbols (Unknown in all positions)

• True or False Equations (Unknown in all positions)

File #2 – Word Problems (32 pages + answer keys)

• Difference Unknown from 10

• Difference Unknown from 20

• Change Unknown from 10

• Change Unknown from 20

• Start Unknown from 10

• Start Unknown from 20

• Mixed Practice

• Subtract to Compare from 10 (How many more/fewer?)

• Subtract to Compare from 20 (How many more/fewer?)

File #3 – Assessments (14 assessments + answer keys)

• Subtract from 10

• Subtract from 10 with Unknown in all positions

• Subtract from 20

• Subtract from 20 with Unknown in all positions

• Fact Families

• Cumulative Test

More from the Practice Makes Perfect Series

BUNDLE - All Practice Makes Perfect Files!

Counting to 120

Place Value

Addition to 20


First Grade Fractions

First Grade Graphing

First Grade Telling Time

First Grade Measurement


Make sure to check out my other 1st Grade Resources

Math Homework

Word Work

Language Arts Homework

Parts of Speech


Math Homework in Spanish

Math Homework in English and Spanish

Kindergarten Math Homework

Second Grade Math Homework


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Total Pages
160 pages
Answer Key
Teaching Duration
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to see state-specific standards (only available in the US).
Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).
Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.


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